KK shorthanded 100NL

[jacknine]

100NL, shorthanded...

CO just joined the table and picked up a pot with a small raise on the flop. I lost a big pot with AK against A4s after that.

CO ($101.25)
Hero ($60.25)

Preflop: Hero is Button with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#CC3333">CO raises $4 </font>, <font color="#CC3333">Hero raises $16 </font>, <font color="#666666">3 folds</font>, CO calls.

Flop: ($34.5) Q[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks, <font color="#CC3333">Hero ...</font>

My preflop raise may have looked pretty tilted after my previous loss. I think I´m ahead here. What´s the best play - simply push because I have only got slightly more left in front of me than what´s in the pot, or make a weak bet to try and get more money in?